Unit of measure
MG medical abbreviation
MG has 3 common meanings: "milligram", "myasthenia gravis", "magnesium". The context of the note or order decides which one is meant.
Each meaning matched at least two public references (3 in all for MG), checked October 23, 2026. The table lists them.
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3 meanings of MG
| Meaning | Latin origin | Where used | Checked against |
|---|---|---|---|
| milligram | None | Prescriptions, Charting | |
| myasthenia gravis | None | Prescriptions, Charting | |
| magnesium | None | Prescriptions, Charting |
Also written: mg, Mg.
Example
Sample label unit: "mg".
A made-up line that shows the abbreviation in place. It is not about any patient and is not an instruction.
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Questions
What does MG mean in medical terms?
MG has 3 common meanings: "milligram", "myasthenia gravis", "magnesium". The context of the note or order decides which one is meant.
Where is MG used?
MG shows up in prescriptions and charting. Its category here is unit of measure.
Is MG on the Joint Commission Do Not Use list?
No. MG is not on the Joint Commission Do Not Use list or the ISMP error-prone list as checked on October 23, 2026.